Just like a spacesuit or a pressurised helmet, a mechanical chronograph has always been part of the official kit of astronauts and cosmonauts. The chronograph is the king of aerospace complications. It can measure short periods of time and has become an essential tool for living and working in space. The history of space exploration also reveals that mechanical chronographs have often enabled missions to be completed, and lives to be saved, in situations where electronic motor systems have malfunctioned. It is for all these reasons and more that the BR-X1 HyperStellar has been launched into orbit.

Technical Specifications:The case, in titanium and aluminium, measures 45mm. The bezel features a blue anodised aluminium insert. The crystal is an AR-coated sapphire and it is water resistant to 100 meters. To protect it from impacts during missions, the square case is covered with a bumper in micro-blasted titanium and rubber that acts as a peripheral protective shell. The chronograph pushers feature a rubber grip.

Movement is the Swiss automatic Bell & Ross caliber 313 with 56 jewels, 28,800 vph and ap ower reserve of 46 hours. It is structured in the shape of an "X" and the upper bridge is treated with black DLC. Functions are: hours, minutes, small seconds at 3 o'clock. Skeleton date at 6 o'clock. Chronograph: 30-min timer at 9 o'clock, central chronograph seconds.